Meant to reply before work. But wanted to look some stuff up which took longer than I had...
Gareth:
Is the alchemical fireproofing permanent for a +4 CF?
Two things:
1 - Yes.
2 - This was something I developed for a thread on the GURPS forums about Giving Cloaks Some Love:
http://forums.sjgames.com/showthread.php?t=142345
It was well received and Narrator
tentatively approved the stuff in the thread for use.
I was trying to look up where I got the +4 DF from, but I think it was one part math and one part "feels right". Note, it doesn't make one immune to fire damage... it just means your clothes won't catch on fire!
Narrator:
There was a specific item for sale, alchemists robes, that cost $150 iirc.
Alchemist’s Garb is $225 and it isn't
fireproof in the least:
DF 4 Sages:
Treated cloth apron, mask, and gloves prevent all ill effects from failures when rinsing off gunk, extracting venom, etc. Also screens out contact agents sprayed from the front.
Narrator:
I am again recalling 3e; earlier iterations of this game had a furemage paying off debts to the guild casting fireproof. I thought it could be cast on objects, even if not as an enchantment.
There's a lot of nonsensical ignoring of the rules in 3e, particularly in the Magic Items books.